Zhanyi in context: Street-network sprawl trends

Zhanyi in context

12345<19751976–19901991–20052006–2020SNDi of street additions
12345<19751976–19901991–20052006–2020SNDi of entire street network
ZhanyiYunnan (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Zhanyi plotted against Yunnan and China. The SNDi of new construction in Zhanyi rose steadily, compared to Yunnan which followed a zig-zag trend with an overall increase and China which followed a zig-zag trend with an overall increase. Most recently, Zhanyi's incremental SNDi rose from 2.25 to 2.49 between 1991-2005 and 2006-2020. In terms of the aggregate network, Zhanyi ranked 14th out of 78 cities in Yunnan and 417th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
2.49
Rank in China
513th of 1843
Rank in Yunnan
21st of 78

Entire Network (Aggregate)

SNDi value
2.27
Rank in China
417th of 1843
Rank in Yunnan
14th of 78

Rankings go from most connected to most disconnected — rank 1 is the most connected.

What about similarly populated cities?

0.81.62.43.2<19751976–19901991–20052006–2020SNDi of street additions
0.81.62.43.2<19751976–19901991–20052006–2020SNDi of entire street network
ZhanyiGoianesiaKlin

In new street additions, Zhanyi built increasingly disconnected streets over time, while Goianésia fluctuated in its street-construction patterns and Klin built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full street network, though, all three cities follow the same trend. Notably, Zhanyi had a more connected network than Klin in 1975 but the two have since reversed their relative ranking.